<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>Document</title>
	<style>

		body{
			background: #000 url() 0 0 no-repeat;
		}
		*{
			margin: 0px;
			padding: 0px;
		}

		li{
			list-style: none;
		}
		.out{
			width: 1204px;
			height: 260px;
			/*background: blue url() 0 0 no-repeat;*/
			margin: 100px auto;
			overflow: hidden;
		}
		.img_list{
			width: 1290px;
			height: 260px;
			/*background: blue url() 0 0 no-repeat;*/
		}
		.item{
			width: 172px;
			height: 260px;
			/*background: red url() center no-repeat;*/
			background-position: center;
			float: left;
		}
		.item:nth-child(1){
			background-image: url(1.jpg);
		}

		.item:nth-child(2){
			background-image: url(2.jpg);
		}
		.item:nth-child(3){
			background-image: url(3.jpg);
		}
		.item:nth-child(4){
			background-image: url(4.jpg);
		}
		.item:nth-child(5){
			background-image: url(5.jpg);
		}
		.item:nth-child(6){
			background-image: url(6.jpg);
		}
		.item:nth-child(7){
			background-image: url(7.jpg);
		}


	</style>
	<script src="https://cdn.bootcss.com/jquery/3.3.1/jquery.min.js"></script>
	<script>
		$(function(){

			$('.item').hover(function() {
				$(this).stop().animate({width:'400px'}, 500).siblings().stop().animate({width:'134px'}, 500);
			}, function() {
				$('.item').stop().animate({width:'172px'}, 500);
			});
		})
	</script>
</head>
<body>
	<div class="out">
		<ul class="img_list">
			<li class="item"></li>
			<li class="item"></li>
			<li class="item"></li>
			<li class="item"></li>
			<li class="item"></li>
			<li class="item"></li>
			<li class="item"></li>
		</ul>
	</div>
</body>
</html>